The X-mini KAI Capsule Speaker ($TBA) is designed to deliver high quality sound from a Bluetooth-enabled device. Even better, it's Bluetooth module also allows the X-mini Kai to act as a Bluetooth dongle to the rest of your X-mini Capsule Speakers, as well as other wired audio devices. The speaker has an impressive playback time and comes with a built-in microphone function that allows hassle-free conference calls. [source]